[iOS] Support pasting HTML

https://bugs.webkit.org/show_bug.cgi?id=133581
<rdar://problem/17070305>

Reviewed by Enrica Casucci.

We can probably share a lot of code between Mac and iOS here, but for now, just
implement the unimplemented functions.

* editing/ios/EditorIOS.mm: (WebCore::Editor::WebContentReader::readHTML):
Implemented based on WebArchive reading code above, and on Mac version of readHTML.
Unlike on Mac, we don't need to support Microsoft CF_HTML format, as nothing
generates it.

* platform/ios/PasteboardIOS.mm:
(WebCore::Pasteboard::read):
(WebCore::Pasteboard::supportedPasteboardTypes):
Added HTML support, as the second preferred format after WebArchive.


Canonical link: https://commits.webkit.org/151579@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@169660 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Source/WebCore/ChangeLog

@@ -1,3 +1,24 @@
+2014-06-06  Alexey Proskuryakov  <ap@apple.com>
+
+        [iOS] Support pasting HTML
+        https://bugs.webkit.org/show_bug.cgi?id=133581
+        <rdar://problem/17070305>
+
+        Reviewed by Enrica Casucci.
+
+        We can probably share a lot of code between Mac and iOS here, but for now, just
+        implement the unimplemented functions.
+
+        * editing/ios/EditorIOS.mm: (WebCore::Editor::WebContentReader::readHTML):
+        Implemented based on WebArchive reading code above, and on Mac version of readHTML.
+        Unlike on Mac, we don't need to support Microsoft CF_HTML format, as nothing
+        generates it.
+
+        * platform/ios/PasteboardIOS.mm:
+        (WebCore::Pasteboard::read):
+        (WebCore::Pasteboard::supportedPasteboardTypes):
+        Added HTML support, as the second preferred format after WebArchive.
+
 2014-06-06  Alexey Proskuryakov  <ap@apple.com>
 
         Try to fix the build after http://trac.webkit.org/changeset/169655

Source/WebCore/editing/ios/EditorIOS.mm

@@ -463,9 +463,13 @@ static void getImage(Element& imageElement, RefPtr<Image>& image, CachedImage*&
     return false;
 }
 
-bool Editor::WebContentReader::readHTML(const String&)
+bool Editor::WebContentReader::readHTML(const String& string)
 {
-    return false;
+    if (!frame.document())
+        return false;
+
+    addFragment(createFragmentFromMarkup(*frame.document(), string, emptyString(), DisallowScriptingAndPluginContent));
+    return true;
 }
 
 bool Editor::WebContentReader::readRTFD(PassRefPtr<SharedBuffer> buffer)

Source/WebCore/platform/ios/PasteboardIOS.mm

@@ -77,6 +77,7 @@ - (BOOL)containsAttachments;
 SOFT_LINK_CONSTANT(MobileCoreServices, kUTTypeGIF, CFStringRef)
 SOFT_LINK_CONSTANT(MobileCoreServices, kUTTagClassMIMEType, CFStringRef)
 SOFT_LINK_CONSTANT(MobileCoreServices, kUTTagClassFilenameExtension, CFStringRef)
+SOFT_LINK_CONSTANT(MobileCoreServices, kUTTypeHTML, CFStringRef)
 SOFT_LINK_CONSTANT(MobileCoreServices, kUTTypeRTFD, CFStringRef)
 SOFT_LINK_CONSTANT(MobileCoreServices, kUTTypeRTF, CFStringRef)
 
@@ -88,6 +89,7 @@ - (BOOL)containsAttachments;
 #define kUTTypeGIF  getkUTTypeGIF()
 #define kUTTagClassMIMEType getkUTTagClassMIMEType()
 #define kUTTagClassFilenameExtension getkUTTagClassFilenameExtension()
+#define kUTTypeHTML getkUTTypeHTML()
 #define kUTTypeRTFD getkUTTypeRTFD()
 #define kUTTypeRTF getkUTTypeRTF()
 
@@ -197,6 +199,12 @@ - (BOOL)containsAttachments;
                 }
             }
 
+            if ([type isEqualToString:(NSString *)kUTTypeHTML]) {
+                String htmlString = strategy.readStringFromPasteboard(i, kUTTypeHTML);
+                if (!htmlString.isNull() && reader.readHTML(htmlString))
+                    break;
+            }
+
              if ([type isEqualToString:(NSString *)kUTTypeRTFD]) {
                 if (RefPtr<SharedBuffer> buffer = strategy.readBufferFromPasteboard(i, kUTTypeRTFD)) {
                     if (reader.readRTFD(buffer.release()))
@@ -236,7 +244,7 @@ - (BOOL)containsAttachments;
 
 NSArray* Pasteboard::supportedPasteboardTypes()
 {
-    return @[(id)WebArchivePboardType, (id)kUTTypePNG, (id)kUTTypeTIFF, (id)kUTTypeJPEG, (id)kUTTypeGIF, (id)kUTTypeURL, (id)kUTTypeText, (id)kUTTypeRTFD, (id)kUTTypeRTF];
+    return @[(id)WebArchivePboardType, (id)kUTTypeHTML, (id)kUTTypePNG, (id)kUTTypeTIFF, (id)kUTTypeJPEG, (id)kUTTypeGIF, (id)kUTTypeURL, (id)kUTTypeText, (id)kUTTypeRTFD, (id)kUTTypeRTF];
 }
 
 bool Pasteboard::hasData()